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If you think your card number or CVV code has been compromised in some way, contact your card issuer immediately.

The best way to protect your number is to disclose it only to people and businesses you trust – and only for transactions that you initiate. Nor do CVV numbers protect you against phishing scams in which someone tries to trick you into giving away your card number and card security code. For more on how credit cards work, check out “ How Do Credit Cards Work? Demystifying Credit Art & Science.” For added in-person security, cards rely on signatures, magnetic strips, and EMV chips.

Therefore, they’re primarily important in transactions that take place online and over the phone, not in person. Though they play an important role in keeping your transactions secure, CVV numbers are only one component of card security: They’re merely a way to verify the purchaser has physical access to the card. Most credit cards do not, but some card issuers let you set up a PIN as an added layer of protection. In the U.S., it’s more common for debit cards to use PINs. Entered on a keypad, a PIN is used to validate in-person transactions, usually in conjunction with a chip embedded in your debit or credit card. Your CVV number should not be confused with your personal identification number, or PIN.

CVC – Card Verification Code or Card Validation Code.

And hey – it’s not as redundant as “PIN number” or “ATM machine”!)īesides CVV, there are many other names for this card security code, including: CVV numbers are typically shown in printed text, even if the credit card number itself is written in raised numerals.ĬVV stands for “Card Verification Value.” (Yes, saying “CVV number” is a bit redundant, but that’s the common usage. A CVV is the three- or four-digit security code that commonly appears on the back of your card near your signature, though some card issuers print it on the front.